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davjac889

Jedi Hopeful
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Why, why, why, why, will my TR3A not start hot?!!!
It is so frustrating. It starts fine cold, don't even need
the choke.
When I take it out for a ride and shut it off and try to
start it , oh I don't know, 5 minutes later, forget it!
Man, its gettin' to me.

Thanks to anybody with advice.
 
When you're driving, the engine compartment is well-ventilated and stays relatively cool. When you stop for a while, the heat builds up in there and causes something to fail. My guess is that either the gas in your carbs is boiling or your coil is getting too hot.

Keith
 
For a temporary fix try wrapping the fuel lines with some insulation and also look at the routing of the fuel lines. Go for a ride and see if that works. My 3 will have a little trouble starting when it is very hot and I know the problem is the fuel is getting very hot from the exhaust manifold. If that doesn't work and you have another coil try installing that after the first fix. If the insulation works you may want to install a heat shield.
 
If you say that the TR does not need the choke even when it is cold.....that says to me the carbs are set too rich. I'm thinking when it gets hot, it is too rich and floods the cylinders. Check the carb mixture according to the manual.
That is my $.05
Scott in CA
 
smaceng said:
If you say that the TR does not need the choke even when it is cold.....that says to me the carbs are set too rich. I'm thinking when it gets hot, it is too rich and floods the cylinders. Check the carb mixture according to the manual.
That is my $.05
Scott in CA
Click to expand...
All good advice, but that's where I would start.
 
You don't say how long this has been going on. Coincide with any repairs? Check for proximity of steel fuel lines to exhaust. The muffler and the fuel line are rather close and can get too close. Bob
 
Have you isolated it to fuel? Are your plugs wet after cranking and doesn't start? Do you have spark? If your coil is overheating it would be a problem. I switched to a Bosch Blue Coil for just this reason.
 
Does it start up readily after sitting for 20 minutes or more ?
 
Does it occur all the time or does it just occur in hot weather. Trying to find out if it is vapor lock (gasoline boils in the fuel line) or if it is something else. Have you recently had or done any work to the engine or fuel system?
 
Also when was the last time you put new gas in it? The gas stations should be switching over to warmer weather formulated gasoline...although half the country has snow right now!

If you still have cold weather formula in the tank, and it's a bit warmer outside, the gas will vaporize quicker which will contribute to vapor lock. Go to a busier gas station that will be sure to have the most up-to-date formula. You still might need to do some other tweaking, but that should help.
 
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